More PR's! Distance-Based and Best Performance (# of Std Deviations)

XCStats tracks PR's on each unique course, since each course has it's own terrain and characteristics. However, this report ignores those differences and
displays seasonal and career records, for both individuals and teams, for commonly run distances. In addition, it shows an athletes' Best Performance relative to all the runners of the same gender
at a given meet, both all-time and seasonally. This is represented as the # of Standard Deviations from the mean.
A value of zero means they had the same performance as the average runner, 0.5 means they beat 70% of the runners. Other values: 1.0=84%, 1.5=93%